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#metamorphic

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John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/DogWalkingGeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DogWalkingGeology</span></a> A <a href="https://mastodon.scot/tags/LifeGoal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LifeGoal</span></a> achieved 🎆🕺🎉💃 Kyanite gneisses occur in the Mull Moine rocks, but I have *never* found a beach pebble of these rocks, despite searching intensely, until THIS MORNING. A very tasty cobble 😋 <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/ThinSectionThursday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ThinSectionThursday</span></a> <a href="https://mastodon.scot/tags/MinCup24" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MinCup24</span></a> It's kyanite for me! Rocks with kyanite are *always* good rocks 🤩🥰 Here's some nice bent and twinned kyanite crystals in a high-pressure granulite-facies gneiss from the Lewisian complex in South Harris. Field of view about 2mm across. More info in Alt text. <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Kyanite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Kyanite</span></a> <a href="https://mastodon.scot/tags/Lewisian" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Lewisian</span></a> <a href="https://mastodon.scot/tags/Metasediment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metasediment</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <span class="h-card" translate="no"><a href="https://mastodon.social/@MineralCup" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>MineralCup</span></a></span></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/ThinSectionThursday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ThinSectionThursday</span></a> Beautiful symplectite coronas around pink (black) garnets in this garnet-clinopyroxene-amphibole-plagioclase-scapolite gneiss from the Lewisian complex in South Harris. Field of view ca. 2mm wide. <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Microscopy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Microscopy</span></a> <a href="https://mastodon.scot/tags/Texture" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Texture</span></a></p>
GeologistsCat<p>When we went on <a href="https://mastodon.social/tags/hedgewatch" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hedgewatch</span></a> in the <a href="https://mastodon.social/tags/Heide" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Heide</span></a>/#Heath. We found again <a href="https://mastodon.social/tags/windkanter" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>windkanter</span></a>/#ventifacts. This was a <a href="https://mastodon.social/tags/sandstone" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sandstone</span></a> a <a href="https://mastodon.social/tags/sedimentary" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sedimentary</span></a> <a href="https://mastodon.social/tags/rock" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rock</span></a> &amp; is now a <a href="https://mastodon.social/tags/quartzite" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>quartzite</span></a> i.e. the <a href="https://mastodon.social/tags/metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>metamorphic</span></a> equivalent. Thus it has seen high <a href="https://mastodon.social/tags/temperature" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>temperature</span></a> &amp;/or <a href="https://mastodon.social/tags/pressure" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>pressure</span></a>. The stripes are the remnants of the sedimentary layers</p><p><a href="https://mastodon.social/tags/CatForScale" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CatForScale</span></a></p><p><a href="https://mastodon.social/tags/geologywithcats" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geologywithcats</span></a> <a href="https://mastodon.social/tags/geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geology</span></a> <a href="https://mastodon.social/tags/CatsOfMastodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CatsOfMastodon</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/ThinSectionThursday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ThinSectionThursday</span></a> Raspberry pink-to-yellow plechroic piemontite, with pale pink muscovite mica, small, clear stand-out spessartine garnets, and blandly clear quartz, in this strange Moine metasediment from Strathconon in northern Scotland. Field of view about 2mm across. The second pic shows the same view between crossed polars, showing wonderfully bright birefringence colours. More info in Alt text of images. <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Manganese" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Manganese</span></a> <a href="https://mastodon.scot/tags/Mineralogy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mineralogy</span></a> <a href="https://mastodon.scot/tags/Moine" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Moine</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p>Very pleased with this boulder from a beach near Bunessan. The white quartz vein cuts gently across bedding and foliation in the grey metasediment, and both are cut by the later quartz-feldspar vein with pink margins. Lovely cross-cutting relationships reveal sequence of geological events 😊🤓 <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.scot/tags/Moine" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Moine</span></a> <a href="https://mastodon.scot/tags/Stratigraphy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Stratigraphy</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><span class="h-card" translate="no"><a href="https://mastodon.social/@PeterLBowden1" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>PeterLBowden1</span></a></span> Beautiful - those layered garnet-rich rocks are 🤩 🥰 !!! <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Archaean" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Archaean</span></a></p>
💧🌏 Greg Cocks<p>Researchers Find Oldest Evidence Of Earth’s Magnetic Field<br>--<br><a href="https://www.forbes.com/sites/davidbressan/2024/04/29/researchers-find-oldest-evidence-of-earths-magnetic-field/?sh=3443e1c050fb" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">forbes.com/sites/davidbressan/</span><span class="invisible">2024/04/29/researchers-find-oldest-evidence-of-earths-magnetic-field/?sh=3443e1c050fb</span></a> &lt;-- shared media article<br>--<br><a href="https://doi.org/10.1029/2023JB027706" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1029/2023JB027706</span><span class="invisible"></span></a> &lt;-- shared paper<br>--<br><a href="https://techhub.social/tags/geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geology</span></a> <a href="https://techhub.social/tags/geomagnetism" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geomagnetism</span></a> <a href="https://techhub.social/tags/paleomagnetism" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>paleomagnetism</span></a> <a href="https://techhub.social/tags/earth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>earth</span></a> <a href="https://techhub.social/tags/global" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>global</span></a> <a href="https://techhub.social/tags/protection" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>protection</span></a> <a href="https://techhub.social/tags/magneticfield" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>magneticfield</span></a> <a href="https://techhub.social/tags/cosmic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cosmic</span></a> <a href="https://techhub.social/tags/IsuaSupracrustalBelt" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IsuaSupracrustalBelt</span></a> <a href="https://techhub.social/tags/fieldwork" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fieldwork</span></a> <a href="https://techhub.social/tags/metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>metamorphic</span></a> <a href="https://techhub.social/tags/structuralgeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>structuralgeology</span></a> <a href="https://techhub.social/tags/greenland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>greenland</span></a> <a href="https://techhub.social/tags/tectonics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tectonics</span></a> <a href="https://techhub.social/tags/Eoarchean" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Eoarchean</span></a> <a href="https://techhub.social/tags/mineralogy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mineralogy</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/ThinSectionThursday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ThinSectionThursday</span></a> A gloriously vivid eclogite-facies rock from the Eastern Glenelg gneisses. First image is between crossed polars, with large bright flakes of muscovite mica, with grey quartz +feldspar, plus a zoned yellow-to-purple crystal of epidote in the centre of the view. Second image is same, in plane polarized light. Field of view about 2mm wide. <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Microscopy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Microscopy</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p>The lovely Scoor Pelitic Gneiss unit looking fabulous in the winter sunshine on the south coast of Mull yesterday. It's Neoproterozoic to Caledonian in age, but exactly how many metamorphic episodes it's experienced, and when, remains a bit mysterious.🤓 😎 <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Moine" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Moine</span></a></p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/DogWalkingGeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DogWalkingGeology</span></a> from yesterday.... Spud has found some garnet-tastic Moine metabasic tuffs(?) or maybe an intrusion. Each knobbly bit is a large garnet crystal, but alas they are never show external crystal faces, and are always stuffed with gazillions of quartz inclusions. Still, lovely to see! <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Garnet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Garnet</span></a> <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.scot/tags/Moine" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Moine</span></a> <a href="https://mastodon.scot/tags/Proterozoic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Proterozoic</span></a> 😊</p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/DogWalkingGeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DogWalkingGeology</span></a> Some lichens hoping eventually to hide this lovely wee Z-foldded quartz vein in Moine meta-sandstone near Dun a' Gheird, in south Mull. <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.scot/tags/Lichen" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Lichen</span></a> <a href="https://mastodon.scot/tags/Mosstodon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mosstodon</span></a> <a href="https://mastodon.scot/tags/lichensubscribe" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>lichensubscribe</span></a></p>
Jason<p>Attendance 70/135 in GL101 yesterday. Back class back from from Reading Week.</p><p>Finished <a href="https://mstdn.ca/tags/metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>metamorphic</span></a> rocks.</p><p>Eclogite <a href="https://blogs.agu.org/georneys/2011/07/02/geology-word-of-the-week-e-is-for-eclogite/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">blogs.agu.org/georneys/2011/07</span><span class="invisible">/02/geology-word-of-the-week-e-is-for-eclogite/</span></a></p><p>Gneiss <a href="https://www.mindat.org/min-48629.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">mindat.org/min-48629.html</span><span class="invisible"></span></a></p><p>Nice gneiss <a href="https://uwaterloo.ca/earth-sciences-museum/gneiss" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">uwaterloo.ca/earth-sciences-mu</span><span class="invisible">seum/gneiss</span></a></p><p>CO2 in class was fine. No idea wat changed with the air handling in my office.</p>
John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿<p><a href="https://mastodon.scot/tags/DogWalkingGeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DogWalkingGeology</span></a> from this morning: lots of pink garnets up to about 20mm across in this Moine garnet amphibolite (meta-basalt) from Ardalanish. These garnet crystals grew about 450 million years ago. 😊 The pale grey rock above is meta-sandstone, so didn't have the right chemistry to grow any garnet: it just stayed as quartz. <a href="https://mastodon.scot/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.scot/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.scot/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a></p>
John Faithfull🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡 ✊🏼✊🏿<p>Some nice beach boulders from during yesterday's wet and murky fieldwork in Iona with PhD student Kang. Two mylonized somethings (left and right) and a gneiss (centre) sitting on garnet-pyroxene meta-ironstone in the rain 😊 <a href="https://mastodon.social/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.social/tags/Iona" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Iona</span></a> <a href="https://mastodon.social/tags/Lewsian" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Lewsian</span></a> <a href="https://mastodon.social/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.social/tags/WhatAreTheseThings" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>WhatAreTheseThings</span></a></p>
John Faithfull🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡 ✊🏼✊🏿<p><a href="https://mastodon.social/tags/DogWalkingGeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DogWalkingGeology</span></a> from a couple of days ago - Spud has found some super sillimanite at Bendoran, as pale knobbly lumps (with a little coexisting pink andalusite) , sticking out of metapelite.These are probably replacements of older, large regional-metamorphic kyanite crystals due to high temperature reheating by intrusion of the Ross of Mull Granite. <a href="https://mastodon.social/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.social/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.social/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.social/tags/Al2SiO5" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Al2SiO5</span></a></p>
John Faithfull🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡 ✊🏼✊🏿<p><a href="https://mastodon.social/tags/DogWalkingGeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DogWalkingGeology</span></a> this beautiful clean schist boulder on Ardalanish beach shimmers and shines in any available sunshine 🤩 😊 . I've photographed it lots of times, but never quite feel I've got it perfect. This morning's effort is typical 😁! <a href="https://mastodon.social/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.social/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.social/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.social/tags/Moine" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Moine</span></a></p>
John Faithfull🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡 ✊🏼✊🏿<p>More nice 449 million +- a wee bit year old garnets in an amphibolitic schist, from this morning's dog walk on the coast near Uisken. Garnets like this are very common on this coast, but I never tire of finding them. 😊 🥰 Boot for scale<br><a href="https://mastodon.social/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a> <a href="https://mastodon.social/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.social/tags/Garnet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Garnet</span></a> <a href="https://mastodon.social/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a></p>
Chris White<p><a href="https://sciencemastodon.com/tags/Gneiss" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Gneiss</span></a> boulder</p><p>I came upon this stream-polished boulder along the Quinebaug River, just below East Brimfield Reservoir near <a href="https://sciencemastodon.com/tags/Sturbridge" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sturbridge</span></a>, <a href="https://sciencemastodon.com/tags/Massachusetts" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Massachusetts</span></a>. Because it has been transported and I just took a photo, I don’t know its origins…but it looks like either the Quinebaug or Marlboro formations, Ordovician and Cambrian, respectively. Laurentia, not Gondwana. Lovely banding, eh? Lens cap is about 4 cm in diameter.<br><a href="https://sciencemastodon.com/tags/gneiss" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>gneiss</span></a> <a href="https://sciencemastodon.com/tags/Paleozoic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Paleozoic</span></a> <a href="https://sciencemastodon.com/tags/metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>metamorphic</span></a> <a href="https://sciencemastodon.com/tags/geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geology</span></a> <a href="https://sciencemastodon.com/tags/photo" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>photo</span></a> 27 mm <a href="https://sciencemastodon.com/tags/Fujifilm" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Fujifilm</span></a></p>
John Faithfull🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡 ✊🏼✊🏿<p><a href="https://mastodon.social/tags/ThinSectionThursday" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ThinSectionThursday</span></a> Not an outstanding science-y rock, but this is my first ever home-made thin section, produced on Tuesday, and the rock is the bedrock to my house in Mull. See the alt-text on the images for fuller descriptions 😊 <a href="https://mastodon.social/tags/Geology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Geology</span></a> <a href="https://mastodon.social/tags/Metamorphic" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Metamorphic</span></a> <a href="https://mastodon.social/tags/Bunessan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Bunessan</span></a> <a href="https://mastodon.social/tags/Microscopy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Microscopy</span></a> <a href="https://mastodon.social/tags/Mull" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mull</span></a></p>
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